The {sup 34,35}Al Beta Decay to {sup 34,35}Si

Conference · Fri Dec 31 04:00:00 EST 1999

OSTI ID:784182

Nummela, S; Baumann, P; Caurier, E; Dessagne, Ph; Jokinen, A; Knipper, A; Miehe, Ch; Nowacki, F; Radivojevic, Z; Ramdhane, M; Walter, G; Aysto, J

The {sup 34,35}Al beta decay was studied at the CERN on-line mass-separator ISOLDE by {beta}-{gamma},{beta}-{gamma}-{gamma} and {beta}-n measurements. In the {sup 34}Al decay, the new data confirm the previous results and complement the level scheme in {sup 34}Si and {sup 33}Si. An intruder (2p-2h)0{sub 2}{sup +} state is proposed at 2.1 MeV in {sup 34}Si in agreement with different shell-model predictions but its decay is still unobserved. A {sup 35}Al {beta}-decay scheme to {sup 35}Si bound and unbound states is established. The {sup 35}Al half life (41.6(22) ms) was measured with a good precision. The first {sup 35}Si level scheme including three levels at 911, 974 and 2169 keV with respectively J{pi} = (3/2){sup -}, (3/2){sup +} and (5/2){sup +} was obtained. The spin and parity values are consistent with a (5/2){sup +} assignment for the {sup 35}Al ground state. The value P{sub n}=0.41(13) was also deduced. New information on the proton-neutron interaction in the (sd-fp) space is obtained.

• Research Organization: Department of Physics, University of Jyvaskyla, Jyvaskyla (FI); Institut de Rechereches Subatomiques, Strasbourg (FR)
• Sponsoring Organization: none (US)
• OSTI ID: 784182
• Report Number(s): none; ISBN 1-56396-907-6; ISSN 0094-243X; CODEN APCPCS; ISBN 1-56396-907-6; ISSN 0094-243X; CODEN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 34
ALUMINIUM 35
BETA DECAY
BETA-MINUS DECAY
BRANCHING RATIO
E2-TRANSITIONS
ENERGY LEVELS
FT VALUE
GROUND STATES
HALF-LIFE
PARITY
PROBABILITY
PROTON-NEUTRON INTERACTIONS
SILICON 34
SILICON 35
SPIN